High Pressure Pumping 



when all costs are 

 considered is 

 accomplished at 

 far less expense 

 than any other 

 method with the 



American Centrifugal Pump 



I 



N an installation required to perform the continuous heavy duty of a high 

 pressure pumping plant the only measure of economy is the total cost 

 after a period of years. 



The "American" Centrifugal will attain higher efficiencies than any other type of pump 

 except the compound plunger pump direct connected to a compound, triple expansion engine, 

 operating condensing, with Corliss valves and interheaters between the cylinders. 



But to obtain the slightly higher efficiencies of this type of plunger pump installation you must pay 

 about double the initial cost with the corresponding greater interest on the investment. The cumbersome 

 and very complicated mechanism of a plunger -pump equipped in the above manner will also cost about 

 a half dozen t'mes more for attendance and repairs than the improved centrifugal which must be charged 

 against the efficiency of the plunger pump in arriving at the economy of the installation. 



The highest efficiency ever attained by a compound plunger pump direct connected to the highest 

 development of steam engine is about 93 per cent. The average efficiency of the ordinary plunger pump 

 direct connected to a simple steam engine is abottt 50 per cent. . 



Any of our specially designed high pressure ^American" cen- 

 trifugal pumps, in medium or large sizes, installed according to our 

 own specifications will maintain mechanical effij^gncies of from 75 

 to 82 per cent. 



Advocates of the complicated old style high duty plunger 

 pumps figure in this comparison an efficiency of 91.5 per cent for 

 the plunger pump, or within 1 .5 per cent of the maximum, :>nd (35 

 per cent for the centrifugal, or 10 to 17 per cent below what is now 

 common practice. 



And the reason they do this is the fact that all actual costs 

 considered Would show an important economy in favor of 

 the "American" centrifugal in every instance. 



There is just as important fallacy in the often expressed 

 statement that the centrifugal is a low head purojit Any of 

 the "American" high pressure single stage pumps will main- 

 tain the above efficiencies on heads up to 125 feet with an 

 equal increase in head for each additional stage. That is, 

 the two stage operates against 250 feet heads, the three 

 stage 375 feet heads and the four stage 500 feet heads. 



And this economy and efficiency is accomplished with a 

 simple pump in which the entire casing, even in the multiple 

 stage types, is composed of only two castings, so designed 

 that the impellers and all bearings can be exposetl without 

 disturbing the pipe conections. 



If you are interested in this higher development <>!' 

 pumping machinery write for General Centrifug..! Pump 

 Catalog, No. 117, the most complete ever issued. 



The American Well Works 



General Office and Works: Aurora, 111. 

 Chicago Office: First National Bank Bide- 



